Quercus oblongifolia Torr.

trees on grassy volcanic alluvial slope at mid canyon below western rim of Barranca Sirupa

trees on grassy volcanic alluvium of lower canyon terrace below western rim of Barranca Sirupa

trees on grassy volcanic alluvium of lower canyon terrace below western rim of Barranca Sirupa

scattered on open, grassy, lower, eastern slope of the Barranca Huapoca, in volcanic gravelly alluvial soil.